Ever wonder what it must be like to come-of-age in an era of information overload, motivational YouTube videos and school-shooter drills? With “Eighth Grade,” a funny, blistering look at life in junior high, director Bo Burnham gives you a peak, morphing from creator/star of MTV’s “Zach Stone Is Gonna Be Famous” into the modern day John Hughes. “Eighth Grade” is an unvarnished, pimples and all, look at adolescence and the anxiety that comes with it. Kayla may not always be able to exactly articulate the way she’s feeling but the movie has no such problem. It’s a study in her innocence and awkwardness that uses carefully selected moments to highlight Kayla’s mindset.